A workhorse machine is a device or equipment that is relied upon to perform a large amount of work or operate for long periods of time without breaking down. It is often considered as the backbone of a particular process or industry. The term "workhorse" implies strength, durability, and reliability, and these machines are typically designed to withstand heavy use and maintain consistent performance. Workhorse machines can be found in a variety of industries, including manufacturing, construction, agriculture, and transportation.